Draft blocker



FIG. 1 is a front perspective view of a draft blocker showing our new design;

FIG. 2 is a front view of the design of FIG. 1;

FIG. 3 is a side view of the design of FIG. 1; and,

FIG. 4 is a top view of the design of FIG. 1. 

The ornamental design for a draft blocker, as shown and described. 